JP4809925B2 - Head mounted display - Google Patents

Description

  The present invention relates to a goggle type display device, and more particularly to a goggle type display device that achieves reduction in power consumption and weight.

  In recent years, goggle-type display devices that are worn by users on their heads have become widespread. This type of device is also called a head-mounted display (HMD), which includes an audio playback unit, an image display unit such as a liquid crystal panel, and a prism, lens, mirror, etc. for enlarging the displayed video to the eyes. A configured optical element and a control unit are provided. The control unit has a function of receiving information that the user wants to view from a device that transmits information, supplying necessary signals to the image display unit and the audio reproduction unit, and providing the user with information from the image display unit and the audio reproduction unit. Have. In many cases, a transmissive liquid crystal panel with a backlight is used for the image display unit in order to provide a high-luminance video. Thereby, the user can view a large screen with a small device even in a limited space.

  Refer to FIG. The image displayed on the liquid crystal panel 1502 is enlarged through the lens 1501 and directly projected onto the retina in the eyeball of the user 1503. At this time, it is necessary to apply 1505A and 1505B polarizing plates to the liquid crystal panel 1502 and use a backlight 1504 that uniformly shines in the plane as a light source.

  In addition, the goggle type display device that can be used while moving can be viewed from the gap between the display and the face for safety, or the image display unit and the scene in front of the user overlap. Some have a see-through function.

  The goggle type display device is required to be reduced in size and weight because the user wears it on the head. In addition, since it is carried and used, further reduction in power consumption is required. Furthermore, the user's purpose of use is diverse, such as watching powerful videos such as watching movies, and viewing detailed characters by connecting an information terminal such as a personal computer. It is necessary to simply switch the function of the goggle type display device according to the purpose of use.

  Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a goggle type display device that solves the above problems.

  The present invention adopts the following means in order to solve the above-described problems. The goggle type display device of the present invention includes an optical element, a control unit, and a self-luminous EL panel that can be freely attached to and detached from the control unit. The EL panel is also called an organic EL display (OELD) or an organic light emitting diode (OLED). By using a self-luminous EL panel, the backlight is different from a liquid crystal panel. A high-luminance video can be provided to the user without using it. Further, since no backlight is used, power consumption can be reduced.

  In addition, when using a liquid crystal panel, a fixture for fixing the relative positions of the optical element, the liquid crystal panel, and the backlight so that they do not shift is necessary. When using an EL panel, the optical element and the EL panel are only fixed so that they do not deviate from each other. Therefore, the deviation is less likely to occur, and the weight of the backlight can be reduced compared to using a liquid crystal panel. Can be reduced in weight.

  In the goggle type display device of the present invention, a memory card can be attached to the main body, and the contents of the image can be changed by replacing the card.

  According to the present invention, by using a detachable self-luminous EL panel, it is not necessary to use a backlight unlike a liquid crystal panel. Therefore, a goggle type display device that is reduced in size, weight, and power consumption is manufactured. I can do it. It is also possible to control the video content using a memory card. The content of the memory card can be changed freely, and the user can set the video content according to his / her preference. In addition, since the EL panel is detachable, it is possible to select an EL panel to be used in accordance with the user's purpose.

It is the figure which showed the outline of the goggle type display apparatus of this invention. It is sectional drawing of the goggle type display apparatus of this invention. It is the schematic of the EL panel used with the goggles type display device of the present invention. 1 is a schematic diagram of a goggle type display device and a controller of Example 1. FIG. 1 is a cross-sectional view of a goggle type display device of Example 1. FIG. It is the schematic of the goggles type display apparatus and controller of Example 2. 4 is an image projected onto the retina of the eyeballs of Examples 2 and 3. FIG. It is sectional drawing of the goggles type display apparatus of Example 2. FIG. 6 is a schematic view of a goggle type display device of Example 3. FIG. 6 is a cross-sectional view of a goggle type display device of Example 3. FIG. FIG. 10 is a top view and a cross-sectional view of an EL panel used in Example 6. 10 is a circuit diagram of a pixel portion of an EL panel used in Example 7. FIG. FIG. 10 is a circuit diagram of a pixel portion of an EL panel used in Example 8. 10 is a circuit diagram of an EL panel used in Example 9. FIG. It is the schematic of the conventional goggles type display apparatus.

  In FIG. 1, 100 is a goggle type display device main body, 102L and 102R are EL panels, 103L and 103R are EL panel insertion openings, and 106L and 106R are earphones. The user attaches the EL panel to the goggle type display device main body through the EL panel insertion slot. The goggle type display device receives information that the user wants to view from a device that transmits the information, supplies necessary signals to the EL panel and earphone, and provides the user with information from the EL panel and earphone. Suppose you have

  FIG. 2 is a cross-sectional view of part A of FIG. 1 when the EL panel is mounted on the goggle type display device body. 101R is a lens, 104R is a user's eyeball, and 110R is an observation transmission window. The image displayed on the EL panel passes through the lens and is directly projected onto the retina in the user's eyeball. The A ′ portion has the same structure as the A portion.

  In addition, a 119R EL panel insertion slot shutter that is opened only when the EL panel is attached or detached is provided. Since no light is incident from the EL panel insertion port by the insertion port shutter, there is no influence when the user views the image.

  In FIG. 3, 300 is an EL panel body, 301 is a pixel portion, 302L and 302R are gate side driver circuits, 303 is a source side driver circuit, and 304 is a connection port. The connection port 304 has a structure that can be easily attached to and detached from a portion that supplies a necessary signal to the EL panel.

  An EL element has a structure in which an EL layer is sandwiched between a pair of electrodes (anode and cathode), and the EL layer usually has a laminated structure. A typical example is a “hole transport layer / light emitting layer / electron transport layer” stacked structure proposed by Tang et al. Of Kodak Eastman Company. This structure has very high luminous efficiency, and most EL panels currently being researched and developed employ this structure.

  In addition, the hole injection layer / hole transport layer / light emitting layer / electron transport layer, or hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer are laminated in this order on the anode. It may be a structure. You may dope a fluorescent pigment | dye etc. with respect to a light emitting layer.

  In this specification, all layers provided between a cathode and an anode are collectively referred to as an EL layer. Therefore, the above-described hole injection layer, hole transport layer, light emitting layer, electron transport layer, electron injection layer, and the like are all included in the EL layer.

  Then, a predetermined voltage is applied to the EL layer having the above structure from the pair of electrodes, whereby recombination of carriers occurs in the light emitting layer to emit light. Note that light emission of an EL element in this specification is referred to as driving of the EL element. In this specification, a light-emitting element formed using an anode, an EL layer, and a cathode is referred to as an EL element.

  Embodiments of the present invention will be described with reference to FIGS.

  Please refer to FIG. FIG. 4 shows a schematic configuration diagram of the goggle type display device and the controller main body of the present embodiment. In FIG. 4, the EL panel is already attached to the goggle type display device.

  400 is a goggle type display device body, 401R and 401L are lenses, 402R and 402L are EL panels, 405L and 405R are illuminance sensors, and 406R and 406L are earphones. In the case of a goggle type display device that does not have an audio playback unit, an earphone is not necessary.

  Reference numeral 411 denotes a controller body, 412 denotes a control switch, 413 denotes an audio input terminal, 414 denotes a video input terminal, and 415 denotes a memory card insertion slot.

  A memory card, which is a medium on which information such as images, sounds, and environment settings when using a goggle type display device is recorded, can be inserted into the memory card insertion slot 415. Information recorded on the memory card can be read and reproduced by operating the control switch 412. It is also possible to change the environment setting when using the goggle type display device by operating the control switch, and to store the information in the memory card. Note that the environment setting refers to the brightness, color tone, earphone volume, and the like of the EL panel. The memory card insertion slot may be in the goggle type display device main body.

  The controller body has a function of receiving information that the user wants to view from a device that transmits the information, supplying necessary signals to the EL panel and earphone, and providing the user with information from the EL panel and earphone. Suppose that The audio input terminal 413 and the video input terminal 414 are for receiving information from a device that outputs information such as images and audio, and are not particularly limited as long as they have this function.

  The goggle type display device main body and the controller main body are connected by a connection cable 416. However, a cordless configuration may be used in which information is transmitted by light or the like. Furthermore, the functions of the controller main body may be separately incorporated into the goggle type display device and the goggle type display device main body, or the goggle type display device may be entirely incorporated without the controller main body.

FIG. 5 is a cross-sectional view of the portion B in FIG. 4 of the goggle type display device of this embodiment.
403R is an EL panel insertion slot, 404R is a user's eyeball, and 410R is an observation transmission window. The image projected on the EL panel is magnified through the lens, passed through the observation transmission window, and then directly projected onto the retina in the user's eyeball. The B ′ portion in FIG. 4 has the same structure as the B portion.

  Note that the lens shape and the positional relationship between the lens and the EL panel are sufficient if the contrast of the image displayed on the EL panel is sufficiently maintained and an enlarged image can be provided to the user without being out of focus. In particular, the shape of the lens as shown in FIG. 5 and the arrangement relationship between the lens and the EL panel are not limited.

  By using the 405R illuminance sensor, it is possible to measure the illuminance of light incident from the outside in the vicinity of the user's eyeball. By automatically adjusting the brightness of the EL panel according to the measured illuminance, it is possible to provide the optimum contrast for the user. It is also possible to reduce power consumption by automatically adjusting the contrast of the EL panel to such an extent that it does not hinder the user from viewing the display on the EL panel. It is also possible to adjust the brightness of the EL panel using the control switch 412 in FIG.

  Note that the illuminance sensor and the function that can be realized by using the illuminance sensor may not be provided.

  In general EL panels, it is necessary to provide a polarizing plate between the lens and the EL panel in order to prevent external light from being reflected by the cathode. However, in a goggle type display device in which external light is difficult to enter, unlike a liquid crystal panel, it is not necessary to use a polarizing plate, and luminance is not reduced by using the polarizing plate.

  Further, since the EL panel can be freely replaced, it is possible to select and insert an EL panel suitable for the user's preference and purpose of use.

  Please refer to FIG. FIG. 6 shows a schematic configuration diagram of a goggle type display device having a see-through function and a controller body of the present embodiment. In FIG. 6, the EL panel is already attached to the goggle type display device.

Reference numeral 600 denotes a goggle type display device main body, reference numeral 605F denotes an illuminance sensor, and reference numerals 606R and 606L denote earphones. In the present embodiment, the goggle type display device is provided with transparent windows 607L and 607R for observing a front scene, which is different from the first embodiment. As a result, the user can use the see-through function of simultaneously viewing the scene in front of the goggle type display device and the image displayed on the EL panel enlarged by the lens as shown in FIG. The change-over switches 618L and R are a mode in which a scene outside the goggle type display device as shown in FIG. 7A and an image displayed on the EL panel enlarged by the lens can be seen simultaneously, and FIG.
In this way, the mode is switched to a mode in which only the image displayed on the EL panel enlarged by the lens can be seen. In the case of a goggle type display device that does not have an audio playback unit, an earphone is not necessary.

  611 is a controller main body, 612 is a control switch, 613 is an audio input terminal, 614 is a video input terminal, and 615 is a memory card insertion slot.

  A memory card, which is a medium on which information such as images, sounds, and environment settings when using a goggle type display device, is recorded, can be inserted into the memory card insertion slot 615. Information recorded on the memory card can be read and reproduced by operating the control switch 612. It is also possible to change the environment setting when using the goggle type display device by operating the control switch, and save it in the memory card. Note that the environment setting refers to the brightness, color tone, earphone volume, and the like of the EL panel. The memory card insertion slot may be in the goggle type display device main body.

  The controller body has a function of receiving information that the user wants to view from a device that transmits the information, supplying necessary signals to the EL panel and earphone, and providing the user with information from the EL panel and earphone. Suppose that The audio input terminal 613 and the video input terminal 614 are for receiving information from a device that outputs information such as images and audio, and are not particularly limited as long as they have this function.

  The goggle type display device main body and the controller main body are connected by a connection cable 616. However, a cordless configuration may be used in which information is transmitted by light or the like. Furthermore, the functions of the controller main body may be separately incorporated into the goggle type display device and the goggle type display device main body, or the goggle type display device may be entirely incorporated without the controller main body.

FIG. 8 is a cross-sectional view of part C in FIG. 6 of the goggle type display device of this embodiment.
In FIG. 8, 601Ra and 601Rb are lenses, 602R is an EL panel, 604R is a user's eyeball, and 611R is an observation transmission window. The front scene can be observed through a transparent window of 607R, a shutter of 617R, a lens of 601Rb, a half mirror of 608R, a lens of 601Ra, and a transparent window for observation of 610R. The image displayed on the EL panel is enlarged after passing through a 601Rb lens, a 608R half mirror, and a 601Ra lens. After passing through the lens of 601Ra again, it is reflected by the half mirror of 608R and then projected onto the retina in the user's eyeball. 6 has the same structure as the C portion. The shutter for the EL panel insertion slot is not shown.

  The 609R flare prevention frame is installed so that harmful light caused by external light does not enter the inside of the device, and may be integrated with the goggle type display device main body 600 or may be configured separately.

  The shutter 617R is operated by the changeover switch 618R in FIG. The function is to block light entering from the transparent window from entering the lenses 601Ra and 601Rb and the observation transmission window 610R, and any function having such a function may be used.

  Further, the function of a changeover switch may be added to the control switch 612 in FIG.

  In FIG. 6, the switching switches 618L and 618R correspond to the shutters for the left eye and the right eye, respectively, but two switches may be operated simultaneously with one switching switch.

  Note that the shape of the optical element and the arrangement relationship between the optical element and the EL panel can realize the see-through function as described above, and the contrast of the image displayed on the EL panel can be sufficiently maintained and the image can be out of focus. Otherwise, the shape and arrangement are not particularly limited to those shown in FIG.

  By using the illuminance sensor 605F, the illuminance at the position where the user is present can be measured, and by using the illuminance sensor 605R, the illuminance of light incident from the outside in the vicinity of the user's eyeball can be measured. By comparing these two illuminances, it is possible for the user to automatically adjust the contrast of the EL panel optimally for viewing in the front scene and the EL panel simultaneously. It is also possible to reduce power consumption by automatically adjusting the contrast of the EL panel to such an extent that it does not hinder the user from viewing the display on the EL panel. It is also possible to adjust the brightness of the EL panel using the control switch 612 of FIG.

  Note that the illuminance sensor and the function that can be realized by using the illuminance sensor may not be provided.

  Please refer to FIG. FIG. 9 shows a schematic configuration diagram of a goggle type display device having a see-through function of the present embodiment.

  900 is a goggle type display device main body, 902 is an EL panel, 903L and 903R are EL panel insertion openings, 905F is an illuminance sensor, and 906R and 906L are earphones. In the case of a goggle type display device that does not have an audio playback unit, an earphone is not necessary. The goggle type display device has a function of receiving information that the user wants to view from a device that transmits the information, supplying necessary signals to the EL panel and the earphone, and providing the user with the information from the EL panel and the earphone. Suppose you have it.

  In this embodiment, unlike the first and second embodiments, the 902 EL panel is inserted only into the 903 L EL panel insertion slot.

  FIG. 10A shows a cross-sectional view of the D portion in FIG. 9 of the goggle type display device of this embodiment, and FIG. 10B shows a cross-sectional view of the D ′ portion. The EL panel insertion slot shutter is not shown.

  In FIG. 10 (A), the user's eyeball 904L is simultaneously viewed as shown in FIG. 7 (A) with the scene outside the goggle type display device and the image displayed on the EL panel enlarged by the lens. It is possible to provide two modes, that is, a mode in which only the image displayed on the EL panel enlarged by the lens can be seen as shown in FIG. 7B. Switching between the two modes is possible by operating a 917L shutter by the changeover switch 918L in FIG.

  10B, a mode in which only the scene outside the goggle type display device can be seen with respect to the user's eyeball 904R as shown in FIG. 7C, and nothing as shown in FIG. 7D. It is possible to provide a mode that cannot be seen. The two modes can be switched by operating the 917R shutter by the switch 918R in FIG.

  By providing images of various modes to the user's eyeballs 904L and R, it is possible to cope with a case where the user wants to more clearly confirm the scene outside the goggle type display device.

  The EL panel insertion slot can be freely selected according to the user's preference. Further, it is assumed that the same function can be realized by driving only one of the EL panels even when the EL panel is mounted in either of the EL panel insertion openings 903L and R of FIG.

  It should be noted that the shape of the lens and the half mirror and the arrangement relationship between the EL panel can realize the see-through function as described above, the contrast of the image displayed on the EL panel is sufficiently maintained, and the image is not out of focus. In particular, it is not limited to this shape and arrangement.

  This embodiment can be combined with Embodiment 2.

  In the present embodiment, the image processing function that the goggle type display device or the controller main body described in the first, second, and third embodiments may have will be described.

  The goggle type display device or the controller main body has a function of processing image information received from a device that transmits image information or a memory card so that the user can see it three-dimensionally and transmitting it to the goggle type display device. Good. This is possible if the left and right images are taken separately from two different directions and displayed. In addition, a method has been proposed in which colors that have complementary colors are selectively used and displayed. A method capable of stereoscopic viewing is not particularly limited. As a result, the user can appreciate a more realistic image. Furthermore, the function can be selected for use by the control switch.

  In the present embodiment, the image processing function that the goggle type display device or the controller main body described in the first, second, and third embodiments may have will be described.

  The goggle type display device or the controller main body may have a function of processing image information received from a device that transmits image information or a memory card so that white and black are reversed and transmitting the image information to the goggle type display device. As a result, it is possible to reduce power consumption as compared with the case of displaying an original image. Furthermore, the function can be selected for use by the control switch.

  In this example, an example in which an EL (electroluminescence) panel used in the present invention is manufactured will be described. 11A is a top view of the EL panel of the present invention, and FIG. 11B is a cross-sectional view thereof.

  11A and 11B, reference numeral 4001 denotes a substrate, 4002 denotes a pixel portion, 4003L and 4003R denote gate side driver circuits, and 4004 denotes a source side driver circuit. Each driver circuit is connected to a connection port 4006 through a wiring 4005. And connected to an external device.

  At this time, the first sealant 4101, the cover material 4102, the filler 4103, and the second sealant 4104 are provided so as to surround the pixel portion 4002, the gate side driver circuits 4003 L and 4003 R, and the source side driver circuit 4004.

  FIG. 11B corresponds to a cross-sectional view taken along line EE ′ of FIG. 11A. A driver TFT included in the source-side driver circuit 4004 over the substrate 4001 (here, an n-channel TFT is used) A p-channel TFT is shown.) 4201 and a current control TFT (TFT for controlling current to the EL element) 4202 included in the pixel portion 4002 are formed.

  In this embodiment, a p-channel TFT or an n-channel TFT manufactured by a known method is used for the driving TFT 4201, and a p-channel TFT manufactured by a known method is used for the current control TFT 4202. Further, the pixel portion 4002 is provided with a storage capacitor (not shown) connected to the gate of the current control TFT 4202.

  An interlayer insulating film (planarization film) 4301 made of a resin material is formed on the driving TFT 4201 and the pixel TFT 4202, and a pixel electrode (anode) 4302 electrically connected to the drain of the pixel TFT 4202 is formed thereon. As the pixel electrode 4302, a transparent conductive film having a large work function is used. As the transparent conductive film, a compound of indium oxide and tin oxide, a compound of indium oxide and zinc oxide, zinc oxide, tin oxide, or indium oxide can be used. Moreover, you may use what added the gallium to the said transparent conductive film.

  An insulating film 4303 is formed over the pixel electrode 4302, and an opening is formed in the insulating film 4303 over the pixel electrode 4302. In this opening, an EL (electroluminescence) layer 4304 is formed on the pixel electrode 4302. A known organic EL material or inorganic EL material can be used for the EL layer 4304. The organic EL material includes a low molecular (monomer) material and a high molecular (polymer) material, either of which may be used.

  As a method for forming the EL layer 4304, a known vapor deposition technique or coating technique may be used. The EL layer may have a stacked structure or a single layer structure by freely combining a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, or an electron injection layer.

  Over the EL layer 4304, a cathode 4305 made of a light-shielding conductive film (typically a conductive film containing aluminum, copper, or silver as its main component or a stacked film of these with another conductive film) is formed. . In addition, it is preferable to remove moisture and oxygen present at the interface between the cathode 4305 and the EL layer 4304 as much as possible. Therefore, it is necessary to devise such that the both are continuously formed in vacuum, or the EL layer 4304 is formed in a nitrogen or rare gas atmosphere, and the cathode 4305 is formed without being exposed to oxygen or moisture. In this embodiment, the above-described film formation is possible by using a multi-chamber type (cluster tool type) film formation apparatus.

  The cathode 4305 is electrically connected to the wiring 4005 in a region indicated by 4306. The wiring 4005 is a wiring for applying a predetermined voltage to the cathode 4305 and is electrically connected to the connection port 4006 through the anisotropic conductive film 4307.

  As described above, an EL element including the pixel electrode (anode) 4302, the EL layer 4304, and the cathode 4305 is formed. This EL element is surrounded by a first sealing material 4101 and a cover material 4102 bonded to the substrate 4001 by the first sealing material 4101, and is enclosed by a filler 4103.

  As the cover material 4102, a glass material, a metal material (typically stainless steel), a ceramic material, or a plastic material (including a plastic film) can be used. As the plastic material, an FRP (Fiberglass-Reinforced Plastics) plate, a PVF (polyvinyl fluoride) film, a mylar film, a polyester film, or an acrylic resin film can be used. A sheet having a structure in which an aluminum foil is sandwiched between PVF films or mylar films can also be used.

  However, when the emission direction of light from the EL element is directed toward the cover material, the cover material must be transparent. In that case, a transparent material such as a glass plate, a plastic plate, a polyester film or an acrylic film is used.

  As the filler 4103, an ultraviolet curable resin or a thermosetting resin can be used, and PVC (polyvinyl chloride), acrylic, polyimide, epoxy resin, silicone resin, PVB (polyvinyl butyral), or EVA (ethylene vinyl acetate) is used. Can be used. When a hygroscopic substance (preferably barium oxide) or a substance capable of adsorbing oxygen is provided in the filler 4103, deterioration of the EL element can be suppressed.

  Further, the filler 4103 may contain a spacer. At this time, if the spacer is formed of barium oxide, the spacer itself can be hygroscopic. In the case where a spacer is provided, it is also effective to provide a resin film on the cathode 4305 as a buffer layer that relieves pressure from the spacer.

  Further, the wiring 4005 is electrically connected to the connection port 4006 through the anisotropic conductive film 4307. The wiring 4005 transmits a signal transmitted to the pixel portion 4002, the source side driver circuit 4004, and the gate side driver circuit 4003 to the connection port 4006, and is electrically connected to an external device through the connection port 4006.

  In this embodiment, the second sealing material 4104 is provided so as to cover the exposed portion of the first sealing material 4101 and a part of the connection port 4006, and the EL element is thoroughly shielded from the outside air. Thus, an EL display device having the cross-sectional structure of FIG.

  In this embodiment, an example of a pixel structure that can be used in the pixel portion of the EL display device shown in Embodiment 6 or Embodiment 8 is shown in FIGS. In this embodiment, 4601 is a source wiring of the switching TFT 4602, 4603 is a gate wiring of the switching TFT 4602, 4604 is a current control TFT, 4605 is a capacitor, 4606 and 4608 are current supply lines, and 4607 is an EL element. .

  FIG. 12A shows an example in which the current supply line 4606 is shared between two pixels. That is, there is a feature in that the two pixels are formed so as to be symmetrical with respect to the current supply line 4606. In this case, since the number of current supply lines can be reduced, the pixel portion can be further refined.

  FIG. 12B illustrates an example in which the current supply line 4608 is provided in parallel with the gate wiring 4603. In FIG. 12B, the current supply line 4608 and the gate wiring 4603 are provided so as not to overlap with each other. However, if the wirings are formed in different layers, they overlap with each other through an insulating film. It can also be provided. In this case, the current supply line 4608 and the gate wiring 4603 can share an exclusive area, so that the pixel portion can be further refined.

  12C, the current supply line 4608 is provided in parallel with the gate wiring 4603 similarly to the structure of FIG. 12B, and two pixels are symmetrical with respect to the current supply line 4608. It is characterized in that it is formed. It is also effective to provide the current supply line 4608 so as to overlap with any one of the gate wirings 4603. In this case, since the number of current supply lines can be reduced, the pixel portion can be further refined.

  In this embodiment, an example of a pixel structure of an EL panel embodying the present invention is shown in FIGS. In this embodiment, 4701 is a source wiring of the switching TFT 4702, 4703 is a gate wiring of the switching TFT 4702, 4704 is a current control TFT, 4705 is a capacitor (can be omitted), 4706 is a current supply line, 4707. Is a power control TFT, 4708 is a power control gate wiring, and 4709 is an EL element. Refer to Japanese Patent Application No. 11-341272 for the operation of the power supply control TFT 4707.

  In this embodiment, the power supply control TFT 4707 is provided between the current control TFT 4704 and the EL element 4708. However, the current control TFT 4704 is provided between the power supply control TFT 4707 and the EL element 4708. Also good. The power supply control TFT 4707 preferably has the same structure as the current control TFT 4704 or is formed in series with the same active layer.

  FIG. 13A shows an example in which the current supply line 4706 is shared between two pixels. In other words, the two pixels are formed so as to be symmetrical about the current supply line 4706. In this case, since the number of current supply lines can be reduced, the pixel portion can be further refined.

  FIG. 13B illustrates an example in which a current supply line 4710 is provided in parallel with the gate wiring 4703 and a power supply control gate wiring 4711 is provided in parallel with the source wiring 4701. In FIG. 13B, the current supply line 4710 and the gate wiring 4703 are provided so as not to overlap with each other. However, if the wirings are formed in different layers, they overlap with each other through an insulating film. It can also be provided. In this case, the current supply line 4710 and the gate wiring 4703 can share an exclusive area, so that the pixel portion can be further refined.

In this embodiment, an example of a pixel structure of an EL display device in which the present invention is implemented is shown in FIG.
(B). In this embodiment, 4801 is the source wiring of the switching TFT 4802, 4803 is the gate wiring of the switching TFT 4802, 4804 is the current control TFT, 4805 is the capacitor (can be omitted), 4806 is the current supply line, 4807 Denotes an erasing TFT, 4808 denotes an erasing gate wiring, and 4809 denotes an EL element. For the operation of the erasing TFT 4807, refer to Japanese Patent Application No. 11-338786.

  The drain of the erasing TFT 4807 is connected to the gate of the current control TFT 4804 so that the gate voltage of the current control TFT 4804 can be forcibly changed. Note that the erasing TFT 4807 may be either an n-channel TFT or a p-channel TFT, but preferably has the same structure as the switching TFT 4802 so that the off-state current can be reduced.

  FIG. 14A shows an example in which the current supply line 4806 is shared between two pixels. In other words, the two pixels are formed so as to be symmetrical about the current supply line 4806. In this case, since the number of current supply lines can be reduced, the pixel portion can be further refined.

  FIG. 14B shows an example in which a current supply line 4810 is provided in parallel with the gate wiring 4803 and an erasing gate wiring 4811 is provided in parallel with the source wiring 4801. Note that in FIG. 14B, the current supply line 4810 and the gate wiring 4803 are provided so as not to overlap with each other. However, if the wirings are formed in different layers, they overlap with each other through an insulating film. It can also be provided. In this case, the current supply line 4810 and the gate wiring 4803 can share an exclusive area, so that the pixel portion can be further refined.

The EL display device of the present invention may have a structure in which any number of TFTs are provided in a pixel.
For example, four to six or more TFTs may be provided. The present invention can be practiced without being limited to the pixel structure of an EL display device.

100 Goggle-type display device main body 101L and R lens 102L and R EL panel 103L and R EL panel insertion slot 104L and R User's eyeball

Claims (7)

A head mounted display equipped with a goggle type display device,
The goggle type display device has an EL panel and first and second illuminance sensors,
The goggle type display device has a function of projecting an image displayed on the EL panel onto a user's eyeball,
The user can see an image displayed on the EL panel at the same time as viewing the front scene,
The first illuminance sensor is used to measure a first illuminance of light incident from the outside at the position where the user is present, and the second illuminance sensor is used to enter the vicinity of the user's eyeball from the outside. Measuring the second illuminance of the illuminating light, comparing the first illuminance with the second illuminance, and brightness of the EL panel so as to be suitable for simultaneously viewing the front scene and the image. A head-mounted display that is adjustable. A head mounted display equipped with a goggle type display device,
The goggle type display device includes an EL panel, first and second illuminance sensors, and a transparent window for observing a front scene,
The goggle type display device has a function of projecting an image displayed on the EL panel onto a user's eyeball,
The user can view an image displayed on the EL panel at the same time as viewing a front scene through the transparent window,
The first illuminance sensor is used to measure a first illuminance of light incident from the outside at the position where the user is present, and the second illuminance sensor is used to enter the vicinity of the user's eyeball from the outside. Measuring the second illuminance of the illuminating light, comparing the first illuminance with the second illuminance, and brightness of the EL panel so as to be suitable for simultaneously viewing the front scene and the image. A head-mounted display that is adjustable. A head mounted display equipped with a goggle type display device,
The goggle type display device has an EL panel, an EL panel insertion slot, and first and second illuminance sensors,
The EL panel can be attached and detached through the EL panel insertion port,
The goggle type display device has a function of projecting an image displayed on the EL panel onto a user's eyeball,
The user can see an image displayed on the EL panel at the same time as viewing the front scene,
The first illuminance sensor is used to measure a first illuminance of light incident from the outside at the position where the user is present, and the second illuminance sensor is used to enter the vicinity of the user's eyeball from the outside. Measuring the second illuminance of the illuminating light, comparing the first illuminance with the second illuminance, and brightness of the EL panel so as to be suitable for simultaneously viewing the front scene and the image. A head-mounted display that is adjustable. A head mounted display equipped with a goggle type display device,
The goggle type display device includes an EL panel, an EL panel insertion slot, first and second illuminance sensors, and a transparent window for observing a front scene.
The EL panel can be attached and detached through the EL panel insertion port,
The goggle type display device has a function of projecting an image displayed on the EL panel onto a user's eyeball,
The user can view an image displayed on the EL panel at the same time as viewing a front scene through the transparent window,
The first illuminance sensor is used to measure a first illuminance of light incident from the outside at the position where the user is present, and the second illuminance sensor is used to enter the vicinity of the user's eyeball from the outside. Measuring the second illuminance of the illuminating light, comparing the first illuminance with the second illuminance, and brightness of the EL panel so as to be suitable for simultaneously viewing the front scene and the image. A head-mounted display that is adjustable. In any one of Claims 1 thru | or 4,
The head mounted display further includes a controller connected to the goggle type display device,
The controller has an input terminal and an information medium insertion slot,
The controller is
A function of receiving the image information from a device that transmits the image information via the input terminal;
A function of reading image information recorded on the information medium through the information medium insertion port into which the information medium is inserted;
And a function of recording environment setting information when the goggle type display device is used on the information medium. In claim 5,
A head-mounted display, wherein the adjusted brightness of the EL panel is recorded on the information medium as the environment setting information. In any one of Claims 1 thru | or 6,
The goggle type display device has the EL panel for left eye and right eye respectively.
The left-eye and right-eye EL panels display different images so that the user can stereoscopically view the head-mounted display.

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